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根据认知用户占用信道时长的统计分布和认知用户带宽需求的统计分布,利用随机分布函数和均匀分布的关系,建立了认知用户模拟模型。在MATLAB下,根据某地区通信基站的基本要求,结合认知用户模拟模型,建立了基于图论模型的认知用户仿真模型,可以计算空闲频谱矩阵、分配矩阵、干扰矩阵等图论模型要素。通过MATLAB仿真实验,验证了此模型与实际情况的吻合性。
According to the statistical distribution of the channel length occupied by cognitive users and the statistical distribution of cognitive user bandwidth requirements, a cognitive user simulation model is established by using the relationship between random distribution function and uniform distribution. In MATLAB, according to the basic requirements of a regional communication base station, combined with cognitive user simulation model, a cognitive user simulation model based on graph theory model is established, which can calculate the elements of the graph theory model such as free spectrum matrix, allocation matrix and interference matrix. Through MATLAB simulation experiments, this model is verified with the actual situation.